#version 330
uniform float offset;
void main(void)
{ 
	//gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
	if(gl_VertexID == 0) gl_Position = vec4(0.25 + offset, -0.25, 0.0, 1.0);
	else if(gl_VertexID == 1) gl_Position = vec4(-0.25 + offset, -0.25, 0.0, 1.0);
	else gl_Position = vec4(0.25 + offset, 0.25, 0.0, 1.0);
}